Kill off a few plugins references

Change-Id: I0b3b84ce64e5b6d73c455bcf261c96bbdd0282f5
Reviewed-on: http://gerrit.dmdirc.com/3906
Reviewed-by: Greg Holmes <greg@dmdirc.com>
Automatic-Compile: DMDirc Build Manager

nbproject/project.properties

 main.test.dir=test
 parser.src.dir=modules/parser/src
 parser.test.dir=modules/parser/test
-plugins.src.dir=modules/plugins/src
-plugins.test.dir=modules/plugins/test
 util.src.dir=modules/util/src
 util.test.dir=modules/util/test
 

nbproject/project.xml

             <source-roots>
                 <root id="main.src.dir" name="Main Source"/>
                 <root id="parser.src.dir" name="Parser Source"/>
-                <root id="plugins.src.dir" name="Plugins Source"/>
                 <root id="util.src.dir" name="Utilities Source"/>
             </source-roots>
             <test-roots>
                 <root id="main.test.dir" name="Main Test Packages"/>
                 <root id="parser.test.dir" name="Parser Test Packages"/>
-                <root id="plugins.test.dir" name="Plugins Test Packages"/>
                 <root id="util.test.dir" name="Utilities Test Packages"/>
             </test-roots>
         </data>